| Value | Category | Cases | |
|---|---|---|---|
| 1985 | 1 |
3%
|
|
| 1992 | 1 |
3%
|
|
| 1995 | 1 |
3%
|
|
| 1998 | 2 |
6.1%
|
|
| 1999 | 1 |
3%
|
|
| 2000 | 5 |
15.2%
|
|
| 2001 | 7 |
21.2%
|
|
| 2002 | 9 |
27.3%
|
|
| 2003 | 6 |
18.2%
|
|
| Sysmiss | 509 |